From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AC93FC6786F for ; Tue, 30 Oct 2018 23:06:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4639C2081B for ; Tue, 30 Oct 2018 23:06:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="bZL5ihj+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4639C2081B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728640AbeJaIB5 (ORCPT ); Wed, 31 Oct 2018 04:01:57 -0400 Received: from mail-pf1-f196.google.com ([209.85.210.196]:43855 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728238AbeJaIB5 (ORCPT ); Wed, 31 Oct 2018 04:01:57 -0400 Received: by mail-pf1-f196.google.com with SMTP id h4-v6so6598070pfi.10 for ; Tue, 30 Oct 2018 16:06:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id; bh=XRkJFF3stD22lptdYkTatKQUzbNskuSZegD0aCVwQIE=; b=bZL5ihj+gH9ezCB1mvjOwfRQOXDtig8siuAOIaavp1IjYq3416l/HXilApmU3J60H0 tv15u7MX+vAzuYD7rlVpnzitj0NU9UehG1Qx9tJ/KLEkho/OcdpKSCgq3/3xCmt6e4r4 rP2X3ghRk9qJg3/7NCfxDbhG/tyiYz3XoMsjU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=XRkJFF3stD22lptdYkTatKQUzbNskuSZegD0aCVwQIE=; b=BxV2LrMgt+Mqe3k7+IPVy9hVs2llHjshgVYsQjXPgK5y01DWEAIbtm472qQHwGyJnw EANliUWHbDUHun51XKlldXWurE/oiuzukQuw9MsgzlfdxxoT9u8Dzpm2gZKfNsq9zD0z 7GquyVomNy1R9e80Zqe128ERp0N/meV5UBjTmmwQQ7izSYyhW4JYvfrWb4pym4fncqL9 FbpZVlJKUs8NCfndbLJUbdhDsO2NZdau4LOaaUGIlTuaNZPcGCf0n/4aniH7/hucDUz5 p9EICsZ4Z2Q/tLNmWB3Fldo+c6dL2tyr3aBrXghFVxYzE4tusTfa33s+6rJSx7tLH7Yu 8paw== X-Gm-Message-State: AGRZ1gIy4f0kG823JUpfBAum13SZQs5O+gvjVhHxwUx4z+h1anZ+YgCJ iPvzBsVnS0clqFpxYyaBhlsnxA== X-Google-Smtp-Source: AJdET5fMdjdFZd5XvGZZ4+IyWfmusBrdYcBCBNL4ca87zBscwZ8XmEme2RM9yrkjb4omtEjT/QaK+Q== X-Received: by 2002:a62:fd0b:: with SMTP id p11-v6mr658194pfh.167.1540940789652; Tue, 30 Oct 2018 16:06:29 -0700 (PDT) Received: from evgreen2.mtv.corp.google.com ([2620:15c:202:201:e418:c825:76cf:5f64]) by smtp.gmail.com with ESMTPSA id z15-v6sm27953490pfn.170.2018.10.30.16.06.28 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 30 Oct 2018 16:06:28 -0700 (PDT) From: Evan Green To: Jens Axboe Cc: Gwendal Grignou , Alexis Savery , Evan Green , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/2] loop: Better discard for block devices Date: Tue, 30 Oct 2018 16:06:22 -0700 Message-Id: <20181030230624.61834-1-evgreen@chromium.org> X-Mailer: git-send-email 2.16.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series addresses some errors seen when using the loop device directly backed by a block device. The first change plumbs out the correct error message, and the second change prevents the error from occurring in many cases. Evan Green (2): loop: Report EOPNOTSUPP properly loop: Better discard support for block devices drivers/block/loop.c | 75 ++++++++++++++++++++++++++++++++++++---------------- 1 file changed, 52 insertions(+), 23 deletions(-) -- 2.16.4